I voted "yes" because, sure, they'll foul him hard when he goes to the rim. But they're not going to do anything blatantly dirty. If they do, they'll only hurt themselves.
You can almost guarantee that the refs will have a hair-trigger on the whistles at the beginning of game 6. This has been a physical series and the potential is there for it to get out of hand, especially after Rondo-gate (despite the fact that I think everyone has made way too big of a deal out of this). Touch fouls going to the basket will be called. Any sign of a hard foul will get a quick flagrant or technical. The league can't afford to let this series turn into a brawl.
Knowing this, Pierce should attack the rim hard in game 6. Rondo too. But especially Pierce - he'll kill them on drives and shoot tons of free-throws.
On the flip side, Perkins and Baby have to walk a very fine line. The Bulls are going to attack the rim hard as well and Perk and Baby will have to avoid collecting fouls. But at the same time, they've got to maintain control over the paint. Perk's 0 foul game last night leads me to believe that he can get his job done without getting into foul trouble. Hopefully Baby can do the same.
Another thought - with the major focus of the war likely being in the paint tomorrow, look for Ray and Eddie to get lots of good looks on the 3-ball...