'My weights, my bar. These belong to me!!!! Back the **** UP!'
One thing I don't like besides the slight crowdedness is people never having seen somebody training hard. I get this sort of

look. Yes I have veins, Yes I sweat, Yes I lift hard. If it offends you stop ****ing looking. I'm not some sort of freak you can pay x amount per month to come and stare at.
Not being big headed but I'm sure anyone with a reasonable physique gets the same. I can't imagine what it's like when you're 'BIG'.
I make a conscious effort not to look at gigantic blokes for any longer than I would at anybody else as I myself don't like being watched.