I sent in a boatload of pictures but here's some. And my issue is not some alts being used. TTD in this case on Tib 42 I have seen having as many as 3 b.s. alliances setup of single of double base accounts. (See pic's) It has not been complained about enough in my opinion. And because they are doing it excessively everyone has to play like them because they are setting the ground rules. There are ways of blocking them so that the accounts cannot be created and joined to another alliance for movement such as don't allow an account with one base to be subbed period. Do not allow accounts with one base past level 20 area. Do not allow 2 or 3 base accounts past level 30 area. Make them play the account if they want to use it.
https://imgur.com/UyU27Bn
Alliance made up of alts.
https://imgur.com/aOArZvI
A 2nd alliance made up of alts.
Examples of where TTD has used. 10+ alts in one area to block and secure POIs by killing alts.
https://imgur.com/8THZKJd
https://imgur.com/FNDM9l6
https://imgur.com/ZbLqkJP
https://imgur.com/UJNLeST