And this is in no way transgressing their terms of service since it's doing the exact same thing any HTTP agent would do. They don't get to choose which agent I use.
In other words, either the action is disallowed completely or it's allowed regardless of my choice of user agent.
It's irrelevant how you violate their Terms of Service only that you do.
If I attempt XSS or SQL Injection against a website it is still illegal regardless of whether the HTTP request uses the same user-agent or is similar to other requests.
You're missing a crucial point, which is that an XSS or SQL injection requests are different requests from those made during regular use. The intent of sending such a request is also different.
In this case, we are dealing with the same requests with the same intent, just made with a different browser. As stated previously, you cannot force my choice of browser.
Now please tell me which (real or imaginary) ToS clause this violates and how it could possibly violate it, even hypothetically.
I never read ToS. Not being a lawyer, I have no way to know which clauses are enforcible, and which aren't. For the same reason, I am not capable of putting a correct interpretation on many of the clauses.
So I never read them. I don't consider them to mean anything. If you operate a public website, that's like erecting a billboard. You can attach ToS to your billboard, but nobody's going to read your ToS; they'll just read your billboard.
I'd like a plugin that can auto-click ToS popups. Like, click any button that says "Accept" (or "So sue me, sucker!")
In other words, either the action is disallowed completely or it's allowed regardless of my choice of user agent.