Not if you do your homework. How many times do you think bets have been lost by 1/2---to 1 point? Millions.
I'm no stranger to the betting game. I fully appreciate the importance of a half point in a basketball game. I've been burned and saved by half points on numerous occassions. But the importance of that half point that allows you to win that one game in the teaser is quite irrelevant when you lose the third game by 20 points. The fundamental problem with teasers is that too many things have to go right.
1. A CFB teaser is a waaaay better bet than a CBB teaser*.
2. CFB teasers are dumb bets.
3. Thus, CBB teasers are really dumb bets.
My friend always comes up with "can't lose" teasers that look great on paper, but then they always lose. I learned my lesson on teasers a while back. Plus the juice is greater on a teaser.
A better way to go than playing the teaser is just to play the moneyline. Playing the moneyline on favored teams is a money play as long as you remain selective. Also, in CBB ML's don't increase linearly with the spread. The ML on a team favored by 6-8 points is usually in the 3-1 range. Once the spread gets up in the double digits, the ML will get up around 10-1. So I like to find games where the I think the favorite will cover the spread (in the 6-9ish) point range. I put a play down on the spread for amount X, and then I put a play down on the ML for X*1.1.
Quick example and then I'm done because this is getting long:
Duke was favored by 6.5 over Cal. I was pretty confident Duke would cover that spread, but I was even more confident that they would win the game. So I put in:
100 Duke-6.5
110 Duke at -280
With this play, three scenarios can happen:
1. You win 210
2. You come out even
3. You lose about 400 bucks.
Option #3 is what will keep a lot of people from making this play. And option #3 will occassionally happen. But if you're selective in how you approach this strategy, you'll get enough option #1's to absorb a potential option #3 hit.
*This is true for at least two reasons: (1) you get fewer points to work with in bb (4 as opposed to 6 for a two-team taser), and (2) there is much more random variance involved in cbb games than there is in cfb games (this statement is not just my opinion. it's factually supportable. an analysis of why it's true, though, will have to be saved for another day (that is, if you even disagree with the statement).).