Well this was an amusing read.

Blaming an airline for a larger passenger??? Come on - get a grip!

As others have said, e-tickets are always issued with an e-receipt that you can print and is usually emailed - if you did not keep it it is your fault(sorry). Also, that you didn't check your BP before boarding and didn't note the *G or the lack of your number on it - again your fault(sorry). You claim to be a "FT type" - which I assume means savvy to the ways of miles, airlines, the travel expeience, yet you've almost proved in actions that you yourself are NOT a "FT-Type" since you've failed several of the cardinal FT "rules" when flying.

I hope you've learned from your experience and next time, whoever you fly with, you have a better experience... but remember like your family you can't choose your seatmate!