If they worked to any acceptable level of efficacy then they could be tolerated. They're only tolerated by people who think they work as well as they claim to work (security theater) but anyone who knows about the performance impacts and/or are tech-savvy enough to understand it is a rootkit and potential exploit (that would fully pwn your device) hates them.
Some cheats are getting rather sophisticated now. There's an ever-increasing number of Pi-devices where the cheating is done externally.