That can potentially open a can of worms, because if the tax deductions are reduced for corporations and not for small businesses, then many savvy corporations could either break off into small units, or relocate where taxes are lower if changes to the statutory rate do not make up for the loss from closing the tax deductions.

FORBES: On Corp Tax Reform, Small Business Wants In

"That can open up a can of worms, " Mr. Kenney confided.

WSJ: Also Rising Since 9/11

The enforcement agency considers the Games an amateur enterprise, even though Olympic basketball players can come from the NBA. "We feel it would open a big can of worms to determine who's professional and who isn't professional, " said Jerry Markling, the NGCB's chief of enforcement.

WSJ: Menu

But be warned - to do this is to open a chocolatey can of worms.

BBC: Does chocolate give you spots?

For insurers and data-sellers alike, the new techniques could open up a regulatory can of worms.

WSJ: Insurers Test Data Profiles to Identify Risky Clients

But the BBA told the BBC the new rules could "open up a whole can of worms".

BBC: Banks take on FSA over 'illegal' PPI rules