Some LocalBitcoins sellers have thousands of trades

[Seth Otterstad]

I see that sellers exist now who are doing huge volumes of trades for bank transfers, particularly in the UK where there is no cheap exchange access.  For example:

https://localbitcoins.com/accounts/profile/Dmtrik/
https://localbitcoins.com/accounts/profile/Netizen/

Are they doing any AML?
How do they keep bank accounts open with such a high volume of trading?
How are they prevent fraud?  US sellers apparently can only accept cash deposits due to fraud.