I have gotten the "How much can you bench?" question at least a twenty times ths year from people I just met at bars, clubs, relatives etc.. If the person is interested in training then I will discuss it and give them tips and refer them to the elitefts site. If they are condescending and trying to fck with me a little like your fat fiend then I will say that I hardly train or that I dont train so they wont bother me.
Usually someone will say something like "I used to bench 300 but I hut my shoulder" or some lie like that. If the person is interested in improving then I will help but if they try to get into pissing contests then I will shut them down.