We've seen what happens when you jump a ship very close to another ship at the end of season 4. I'd wager anything in a certain radius of the FTL will get pulled in. Problem is that radius tends to be very close to the ship doing the jump, so you're more likely to be ripped apart then pulled in. It might be possible for a raptor to be pulled into a jump if it's very close to a much larger ship. But say the Colonial One pulling a Cloud 9 into a jump.. no way. The only thing it would do if it jumped while extremely close to the 9 is cause extreme damage to the ship.