What rsk2mc meant by "safe" is more or less a figure of speech... meaning not to have to go through the hassle of finding the APK from a site and installing it again
and yes I am almost certain verizon can tell if you are "stealing" free hotspot from them, however (and don't quote me on this) you will most likely be fine if you are not going over 2gb a month... try to stay under the "radar". there are soooo many verizon customers, i think it would be kinda hard to go after all of the people abusing the free wireless tether app... but like I said if you stay under the radar and aren't using a ton of GB a month, you should be fine.. I used free wireless tether on my incredible for a long time and never had any issues.