I'd like to agree but you should look at 49 C.F.R. § 1540.113. This implies that anyone who holds a pilots license may have that inspected by a TSO and further, the TSA may deem the pilot to be a security risk with the resulting revocation of their certificate.
In light of this I believe the OP had the right approach by not confirming whether they were a pilot, and with good reason given this particularly nasty piece of legislation.

§ 1540.113 Inspection of airman certificate.
Each individual who holds an airman certificate, medical certificate, authorization, or license issued by the FAA must present it for inspection upon a request from TSA.
§ 1540.115 Threat assessments regarding citizens of the United States holding or applying for FAA certificates, ratings, or authorizations.
(a) Applicability. This section applies when TSA has determined that an individual who is a United States citizen and who holds, or is applying for, an
airman certificate, rating, or authorization issued by the Administrator, poses a security threat.
(b) Definitions. The following terms apply in this section:
Administrator means the Administrator of the Transportation Security
Administration.
Assistant Administrator means the Assistant Administrator for Intelligence
for TSA.
Date of service means—
(1) The date of personal delivery in the case of personal service;
(2) The mailing date shown on the certificate of service;
(3) The date shown on the postmark if there is no certificate of service; or
(4) Another mailing date shown by other evidence if there is no certificate
of service or postmark.
Deputy Administrator means the officer next in rank below the Administrator.
FAA Administrator means the Administrator of the Federal Aviation Administration.
Individual means an individual whom TSA determines poses a security
threat.
(c) Security threat. An individual poses a security threat when the individual
is suspected of posing, or is known to pose—
(1) A threat to transportation or national security;
(2) A threat of air piracy or terrorism;
(3) A threat to airline or passenger security; or
(4) A threat to civil aviation security.
(d) Representation by counsel. The individual may, if he or she so chooses,
be represented by counsel at his or her own expense.
(e) Initial Notification of Threat Assessment—
(1) Issuance. If the Assistant Administrator determines that an individual
poses a security threat, the Assistant Administrator serves upon the
individual an Initial Notification of Threat Assessment and serves the determination upon the FAA Administrator.
The Initial Notification includes—
(i) A statement that the Assistant Administrator personally has reviewed
the materials upon which the Initial Notification was based; and
(ii) A statement that the Assistant Administrator has determined that the
individual poses a security threat.
(2) Request for Materials. Not later than 15 calendar days after the date of
service of the Initial Notification, the individual may serve a written request
for copies of the releasable materials upon which the Initial Notification was
based.

Source - http://www.gpo.gov/fdsys/pkg/CFR-201...ec1540-113.pdf

From PPRUNE -
49 C.F.R. § 1540.113, requires pilots to allow inspection of their pilot and medical licenses by TSA, but the regulation does not specify which TSA personnel are so authorized to inspect licenses, what the procedure for the inspection is, what kind of training TSA personnel have to accomplish in advance of performing this function, or any other specifics.

This gives you a bit of insight into how the TSA 'thinks' -

ALPA's Legal Department conferred with TSA HQ in an attempt to clarify which individuals within TSA had inspection authority, what training those individuals received and information about the agency's procedures for inspection of pilot licenses. As a result of those conferences, TSA studied the issue and in June 2004, advised ALPA that public release of detailed information about its internal authorizations and the procedures associated with inspection of pilot credentials is not in the national interest at this time.

Not in the national interest. WTH, just answer a simple question without hiding behind the curtain!