A slightly more practical system for defeating surveillance cameras specifically.<p><a href="http:&#x2F;&#x2F;hackedgadgets.com&#x2F;2008&#x2F;02&#x2F;21&#x2F;ir-leds-used-to-defeat-security-cameras&#x2F;" rel="nofollow">http:&#x2F;&#x2F;hackedgadgets.com&#x2F;2008&#x2F;02&#x2F;21&#x2F;ir-leds-used-to-defeat-s...</a><p>Not as noticeable to bystanders. Much more passive approach that can be maintained for as long as necessary.<p>Not as likely to get the police called on you.<p>Combining the two approaches could work <a href="http:&#x2F;&#x2F;www.digikey.com&#x2F;catalog&#x2F;en&#x2F;partgroup&#x2F;ir-laser-module&#x2F;17892" rel="nofollow">http:&#x2F;&#x2F;www.digikey.com&#x2F;catalog&#x2F;en&#x2F;partgroup&#x2F;ir-laser-module&#x2F;...</a>