Apart from not knowing for certain every time that it is an alt in an alliance and it not necessarily being intended as an exact number but a general indication of a high number, I think the OP was making the point that one alliance group of 50 was also controlling 100 (or a very high number) other accounts.
However, the issue of alt accounts has been discussed many times and we've not seen any action on them. Abuse of them in particular ways led to some changes in the game a few years ago, but they're now 'allowed' although when I started playing they weren't but many used them and no action was taken.
If the OP has evidence of abuse as described, he should a) tell us the world he's talking about and b) provide that evidence of abuse (similarity of account names etc) to show that they are linked.