Is it ever ok to stop seeing someone via text?

It is always permissible to stop seeing anyone for any reason you have... text, email, in person or however you "see" them. Especially if they are aggressive.... or just an everyday plain old a-hole.

"I hope this message finds you well. I am informing you via SMS that our relationship has been terminated. As stated in the beginning, this relationship can be terminated via any form of communication and without reason. Please, take a moment to fill out this exit survey. I want to know how I am doing. I appreciate your time and interest."

Your personal safety and security should always be number one. Use text messaging for sure if you truly feel threatened. Don't worry about how he will feel or what others may think. It's your safety, not his or theirs. Hope it works out for you and good luck. :)

No. This communication has to take place face to face!!

IMO Depending upon the level of involvement, this should take place face to face in a public place.

IE: if only 1 or 2 dates have taken place, and no uglies have been bumped...... then IMO a text is acceptable.

Yes, you don't need to risk being harmed to break up with someone.
It's also OK to change your number and not tell him the new one.
You do what you need to do

If they have aggression issues then def stay away from them as much as possible. So yeah over text sounds reasonable in that situation.

Sounds like you already know the answer.
Being polite takes a back seat to getting beat.

It's the cowardly way out. It's best to just be up front and completely honest about everything. Most men get upset with ambiguity because there's nothing constructive, we need to know why we aren't a good choice so that we might improve. But there are also psychos who will flip out regardless