No
No more so than the use of a cell phone.
http://www.TheSignalJammer.com
http://www.thesignaljammer.com/worldwide-portable-cell-phone-jammer.html
In most countries - phone-tapping is illegal - unless done by law-enforcement agencies under a warrant.
When you use an EMS or cell phone jammer a lower power radio signal is broadcast.this signal is capable of cutting off communication between the cell phone and its base tower.
This would be an illegal activity under US federal laws, and in many other countries.
Cell phone apps are not illegal. There are thousands of legitimate cell phone apps on the market that can be implemented for every day use. The only apps that may be illegal are apps that may violate copyright or trademark infringements.
In Brooklyn, Ohio it is illegal tio use a cell phone while driving
no
no
Hell yes, but its illegal