Only thing I don't like about VATSIM is that they do accept "free emails"...My ISP does not issue an email...Screw them
I think you mean to say 'they do NOT accept free emails'
If you join Vatsim you join using your real full name, nobody flies or controls under an alias.
Likewise only 'Proper' email addresses are used. This helps stop abuse of the system. Everybody is therefore accountable for their behaviour and anybody acting the fool can be banned. Thankfully bad behaviour and bans are rare, a testament to the system.
Don't blame Vatsim because you have a crappy ISP that don't issue an email, there are lots of organisations (nothing to do with FS) that do not accept such email addresses.
Vatsim take there Flight Simming seriously, there are plenty of servers available for those that don't.