<human>: Can you succinctly summarize the text in 1-3 sentences?

Ok so a couple of days ago new tenants moved to our basement suite and we gave them the wifi password. Ever since then, my ping in online games skyrocketed from 50ish - around 300s. I suspect that these people are torrenting movies non-stop and its a pain in the ass. I have talked to my parents about it to increase the speed and they say it good that the internet is slow as it'll discourage me from gaming, and I can't exactly tell the tenants to stop downloading :/. Is there anything I can do with my router that would throttle their wifi access without disrupting mine? I know its a dick move but fuck those people i   got gaming that needs to be done.
<bot>: New tenants torrenting non-stop, fking up my online gaming. Need way to throttle their access without disrupting my own.