Up until my class today I didn't care one bit about printing because like I said this is a permitless open carry state and there is nothing illegal at all about printing. However I had never thought about it the way he was thinking about it, in that if someone were to idk enter a gas station and scan the room and notice me printing it will make me his number 1 first target. I had just never looked at printing that way before, like I said I looked at it like who cares if I print some. As far as my build 6'1 190 lbs and typically in the summer months I wear shirts that I guess you would say fit they aren't skin tight but they aren't big either they are just my ideal fit sized shirts. I typically wear a size L, sometimes a M.
People aren't going to notice. I carry and XD Mod2 compact in OWB holsters with medium t-shirts similar to what you described. I'm a small guy who weighs around 170 lbs. No one notices my firearm printing. I walk by rent-a-cops and off duty police officers countless times over the years who are doing security at banks, movie theaters, and other places where guns aren't allowed, and they or other employees do not notice. I've been around antigun family members, to my kids soccer games, restaurants, to a number of local malls (where guns aren't allowed), and no one notices. I've even seen a few people open carrying in my state (it's legal here), and they lived to tell about it. When I'm out and about, I'm not staring everyone down, and unless it's a nice looking female, I'm not staring and critique everyone I see are walk by.
I think all this Paranoid "printing" crap, what ifs, and horror stories are mostly something that's in gun owner's heads. Anything could make you a target for a crime. Carrying a wallet, driving a nice car, wearing jewelry, carrying a purse, having the latest and greatest iphone or electronics, taking out cash and/or receiving change whiles paying for services or goods, etc. Those are all things criminals are more likely to pay attention to and notice and these are things people do and open carry on a daily basis... It's just an unwarranted fear in my experience and opinion fulled by a couple of cases of anecdotal evidence at best.
I took a carry class 3x. Once for myself, once with a friend, and again for my Utah carry permit. In all of those cases the instructors attempted to indoctrinate with their opinions and personal biases on method of carry, brand of gun, type of holster, etc instead of just giving the pros and cons on the subject and letting the individual decide. In one class, the instructor was giving out incorrect and dated legal information. I learned to take their opinions with a grain of salt instead of fact.