There is nothing wrong with being barefoot in sneakers, people do it all the time. It still looks better than wearing sandals with socks. For me it usually causes my feet to perspire more and it leads to a pair of smelly shoes. At the present time I don't own a pair of sneakers, just one pair of closed toed footwear and the rest are flip flops. If you want to wear trainers with bare feet, go ahead do what makes you happy!
Cheers, that gives me confidence I know it was probably a lame question, but I just had to ask Cheers
Actually I did that quite a bit. In fact, the fact that my feet do get hot and sweaty in them is a good excuse to kick them off and pad around barefoot instead. Although, the other day, I did have a homeless man generously offer me a pair of socks (true story!)! Needless to say, I politely declined. However, as was already mentioned, be prepared for a bit of foot odour, as the closed environment of such shoes is a breeding ground for bacteria. Cheers!