no, they may move the line after you make a large bet because they want wagers on both sides of the line - and if you have a pattern of doing that routinely then they may eventually consider you a "wise guy" and move the line depending upon how you bet because they respect your opinion.
The big sports books are not "afraid" of professional bettors -because it is very hard for anyone to beat the 10% vigorish. And if you are a professional, I would assume that you would spread your bets around anyway.
I don't agree with much of that, but it's a moot point for most, because of the last sentence.
Online books will limit and boot you for sure. Fairly unpredictably.
You don't have as much to worry about with Vegas books unless you are a pretty big bettor. However William Hill has booted a lot of people. Our own, Tom G was booted from the app. I know others who have been booted from the MGM app.
On the other hand, I know a guy who is a bet runner and he doesn't really hide it at all. He answers the phone and runs up to the counter and bets pretty decent amounts. He hasn't really had any problems.
If you are willing to go make the bets in person, and are not often betting 5k+ per game, you should be able to figure out how to do it.
Really, these kinds of things aren't what the OP should worry about. Something like 1% of sports bettors are winners. So there's your first hurdle.
Another good thing to read is the FAQ on sportsbetting at the 2+2 forums.
Also, just in case you are getting these ideas form RJ Bell, or "journalists" who facilitate conmen like Vegas Dave. When people start talking about "sharps" and "wiseguys" I get a little worried. So, here's the thread I made for these occasions. http://wizardofvegas.com/forum/gambling/sports/28176-are-pick-sellers-and-touts-legit/