The ideas of both deleting bounties and bounty broker have been suggested before and I'm okay with either idea. NeilF's excellent suggestion of a bounty selling as a criminal activity is new to me, though. At the risk of threadjacking, if we take that and add a few more pieces, data-crime could be an interesting new career option.
Trading data seems the most easily created thing in this vein. Cashing in other people's unwanted bounties is the on-point example. Trade in things like sims (as mentioned so many times on Galnet), military plans, blueprints and prototypes should find an obvious home here. It could be an interesting and lucrative addition and alternative to regular trade. If nothing else, we can finally do something with that daft menu where the only option is 'I want to sell stolen goods' (assuming FD haven't already done something since 1.3 - I'll check later, if I remember).
Beyond that, we could add hacking limpets and blank data storage modules to copy data to. You could fire limpets at stations or ships and they would do whatever you've set them for - pirating, stealing, replacing or erasing data, as required. Targeting a station would be tricky, since the outside would naturally be protected from such attacks and the inside is full of guns - you'd fire off one limpet and then you'd run like Linford Christie being chased by a mob of angry women armed with special castration scissors.
Obtaining, planting or erasing data for a faction could be interesting and should tie in quite nicely with PowerPlay. Getting trade data from a station could be used to unlock live data for an entire area, allowing traders to plan profitable routes much more easily. Selling the data should be quite profitable. Buying a copy should naturally be quite expensive, but profitable for a savvy trader.
It's a little off-topic, but it's an idea, anyway.