I got an SSSS on my DM card today while flying standby. But I'm not sure that it means extra harrassment....

The reason why I doubt it is that the TSA doesn't ever look at your BP, this is done by a UA or private security employee. So how would the screeners even know to give you an extra once over?

As there are no longer extra screenings at the gate, there doesn't seem to be any reason to fret about the SSSS on your BP.

Furthermore, when I traded my DM card for the actual BP the SSSS was no longer there.