I know your frustrations! My best friend wanted guinea pigs for her 4 and 2 year old (bad enough) so after giving her advice on minimum cage sizes, needs of the pets, the need for her to take full responsibility I even covered sexes. I suggested she rescued two sows over 1 year of age as my friend can be nervous with small fast animals and I felt this would be the best route for her. I told her boars would be fine too but definitely an older pair as less likely to fall out. I knew she was looking at a farm for the piggies so I told her definitely do not get two young boars as they may fall out when they hit hormones and I'm not experienced with that so wouldn't be able to help...
So one day I get a text and she had been to the farm and come home with 3 boys... all because she couldn't take two and leave one brother there all on his own as they all get on so well together... just 6 weeks old. To top it all, they are living in a 2 floor 4ft x 2ft hutch which now doesn't meet the guidelines as they brought it planning to get two pigs.
I'm half prepared for taking one off her hands and getting him neutered when they fall out which I feel it more inevitable than anything.