For the record I'm midway through my last year at the liberal indoctrination camp in a liberal arts major (history, the one true discipline) at a major public university and it's been...decidedly balanced.
I've had more professors who fit the stereotype of the eccentric academic than any of the supposed raging liberals you hear about. My professors are way more likely to excitedly show us slideshows of shit (literal and figurative) they dug up in Jordan and then angrily yell about the inaccuracies in 300 than they are to try to crush anyone for disagreeing with their politics. I've had European expats, cashmere sweater wearers, baldheaded biker boot wearing Army vets and a general parade of well meaning nutty old dudes for professors. My university has a retired three star as an adjunct in the department who is pretty well liked according to people who have taken his classes (I never got to take his class personally). Many of my professors were pretty liberal, many weren't, it wasn't that big a deal.
I've also had one professor who was a super angry, raging liberal (everybody's got to have one in life I guess) albeit in a class that was probably to be expected in and I don't think she was successfully indoctrinating anyone, she was mean enough that it would astound me if any who didn't already agree with her embraced her politics (or anything else about her), we did the work, got the grade and got the hell out. Honestly, a lot of people probably move right after taking her classes.
If this was the liberal conspiracy to indoctrinate America's youth it's either not going particularly well or is extraordinary subtle.
(I am willing to concede there are probably schools where the majority of the faculty are overwhelmingly liberal and push the agenda hard or whatever but to be honest those schools' reputations tend to precede them and the people showing for freshman orientation are probably already pretty far left of center).