Of course. Everyone should be mindful of their legal rights and obligations whenever they enter into any potential commercial or investment action. Just like you should always check with your doctor before starting any exercise program.
Keep in mind though that the laws around crypto and DeFi vary wildly from country to country and are generally in a legal grey area of limbo where no one is quite sure what the rules are.
This is exactly why the DAO pays for lawyers to advise the team in the USA at Morrison Cohen.
In practice, while there may be theoretical liability based on DAO votes (it’s basically just a legal theory at this point), even if it exists, the chances of anyone going after Random DAO Voter No.73 (or whatever) are extremely low - the benefits are unlikely to be worth the costs.
Also this doesn’t just apply to bZx - in theory anyone who participated in governance in any project is at risk (ever voted in Uniswap, Aave or COMP governance?), or even if you participated in Discord discussions and made suggestions that were accepted etc…
The people at most legal (potential) risk are the developers - the people with the most influence over the platform as well as the biggest token holding. Even with them, the rules are in a total grey area though, and courts are likely to look very favourably on their previous successes (before the DAO) in refunding users who lost money on the platform and the current efforts to do the same, as showing good faith and real efforts to help people (as opposed to the majority of projects that do nothing after hacks).
EDIT: Just to add that of course the current proposal explicitly says that recovered assets are to be given to the owners who lost them (unless the owners have already accepted compensation in the form of debt tokens, in which case they obviously can’t double up), so the point you’re making does not arise at all with the present proposal, although it is theoretically true.