Yep, you guessed it, common sense when applying the information contained in them. Remember that just like many traditional print and visual media offerings, electronic newsletters are written by individuals expressing their own opinions on a subject. Just look at what happened during the recent presidential election as an example. However, that's what free speech is all about. Idea's are allowed to be expressed freely without restrictions and fear of reprisals from authority as long as they are not libelous.
Free speech is just one of the wonderful things about living in a democracy.
It also can be a wealth of information to any individual or business as long as they use common sense when applying it. I'm getting there. Free newsletter offers should be treated like any other freebie. The best way to protect your privacy when applying for them is to follow the instructions I gave you earlier in setting up free e-mail accounts. This way you can subscribe to as many free newsletters as you wish without giving out too much personal information.