I posted this on the Wizard of Vegas forum in a thread about casinos exchanging chips from other casinos. What was once a common practice isn't anymore because of two recent smash and grab heists inside Caesars and Paris. Here's what I wrote:

There were two robberies recently in Vegas where the crooks smashed the cases that held chips at vacant tables. One robbery was at Paris and one at Caesars. the crooks were careful to grab the high value chips since it was obvious they didn't have much time for these smash and grab heists.

As a result, Caesars and Paris and the other casinos in the Caesars group will not accept $500 and higher chips from another casino.

I was at a craps table when a player presented $500 chips from Paris and was told to bring them to the cage... and he returned a few minutes later to say the Caesars cage would not accept them and they told him to go back to Paris with them. This way the player's play record could be checked to see if he should have the large denomination chips.

Update: I heard there might have been a smash and grab at Planet Hollywood.