I agree with you that is a dangerous way of living. However, you can't deny its benefits. Of course you must be very careful. I guess what you are saying about language applies to many other fields when it comes to the use of Internet. I have seen many other field professionals which look up for technical terms just relying on google. Nowadays anyone can run a website, write whatever comes to his or her mind, and try to put it in the first lines of google searchs. It is indeed dangerous.
I do not know wheter we should encourage or discourage other people to do it. However I also do not know whether we should encourage people (specially young people) to study math, philosophy, English or Portuguese.
By the way, for specific linguistic uses, there are the famous language database "corpus", suitable for searchs and serious studies.
- For Teachers