I think this is more of an issue on IT charters than Lo-co's to be fair. I've flown with the Easy brigade on four return trips in the last month and each flight has been nothing but pleasant. I found most of the pax to be either suited business types, single people or families.
I flew to Alicante once (never again) with BY from BHX and it was a nightmare. All the charter stereotypes were on there... shell suited builders with tatoos, porky mothers with big gold earrings screaming at their offspring, skinheaded blokes all chanting football songs...since that day I vowed I'd never step on a charter ever again.