[PokerDonkey27]

[/ QUOTE ] NJ law (unlike NV law) states that advantage players can't be kicked out so I wouldn't worry about losing comps at the stakes you (and I) play.

[/ QUOTE ]
Casinos have made a great amount of effort and spent a great deal of money trying to thwart card counters. Among the countermeasures used to prevent card counters from profiting at blackjack:

Harassment of suspected card counters by casino staff. This may be as simple as engaging a suspected card counter in a conversation to break their concentration.
Card counter identification using books of photos and new facial recognition technologies.
Computerized scanners in blackjack tables which can identify counting systems when in use.
Shuffling more often or shuffling when a player increases his wager size.
Changing rules for splitting, doubling down, or playing multiple hands. This also includes changing a table's stakes.
Some jurisdictions (like Nevada) have no legal restrictions placed on these countermeasures. Other jurisdictions, like New Jersey, limit the countermeasures a casino can take against "skilled players". [12]

Some of these countermeasures have a downside for the casino as well. Frequent shuffling, for example, reduces the amount of time that the noncounting players are playing and consequently loses money for the house. Some casinos now use automatic shuffling machines to compensate for this. Some models of shuffling machines shuffle one set of cards while another is in play. Others, known as Continuous Shuffle Machines (CSMs) allow the dealer to simply return used cards to a single shoe to allow playing with no interruption. Because CSMs essentially force minimal penetration they remove almost all possible advantage of traditional counting techniques. In most online casinos, the deck is shuffled at the start of each new round, ensuring the house always has the advantage.

A pitboss who determines that a player is a card-counter might either "back off" the player by inviting him/her to play any game other than blackjack, or will ban him/her from the casino itself. In jurisdictions where this is not legal, such as Atlantic City, a pitboss can require the player to flat-bet and disallow players from entering in the middle of a shoe. Such countermeasures effectively remove any chance of gaining an advantage from card counting in multi-deck games. The player's name and photo (from surveillance cameras) may also be shared with other casinos and added to a database of card-counters and cheaters (Note: card counting is not cheating, but casinos still associate the two groups together) run for the benefit of casino operators.

from Wikipedia

Don't worry about it at your stakes level...but don't be obvoius about it either.