Handle scam accounts

[jbesraa]

Lately there is an attack on the bot where newly created users take offers and do not pay them, requiring the other party to dispute. The scam user then creates fake account that resembles one of the customer support account and contact the offer maker to "solve" the problem, encouraging them to release the funds.

A possible solution would be to block newly created account for X amount of time, unless they are added via referral link.

Additional solution could be to limit new users trade amount until they reach some threshold.

[grunch]

Probably one month ago @Catrya and I were talking about how to implement something like this, IMO both of your your proposal are against new users starts to use the bot, but we can allow to a user to change user settings to don't allow new users to take him orders.

For example:
Alice is selling but don't want to new users take her orders, so alice run /settings then /setcounterpartmindays 50 or something like that, I think that is a bit too long for a command, but the idea is when Alice creates an order a new user Bob which have 2 days using the bot can't take her orders, but Carol which have 100 days can.