I've been using GoogleVoice off and on for years, but have started using it more, and using it as my "main" number now. In the past, I've had more than a handful of GoogleVoice numbers, and at one point lost one as a result of not using it, and not checking the email account it was tied to for awhile; wasn't a big deal, and in fact, it was a good thing, since it led to my awareness that like email accounts, it's possible for them to be lost.
What are reasons that a GoogleVoice number might be lost, and per reason, what if any actions should be taken to avoid them? For examples, might include, but are not limited to: unintentional-abuse, account-hacked, use-based-termination, reuse-of-"real", etc.
Ask the question in part, because while I have a pretty good idea of how a similar question about Gmail might be answered, I have no idea what I should expect from GoogleVoice.
Best Answer
If you read the terms of service (which are very hard to find btw) it states what is prohibited:
Place calls or offer to do the same with respect to any unlawful, defamatory, harassing, abusive, fraudulent, infringing, obscene, or otherwise objectionable content
Enter forwarding phone numbers that are not under the direct control of the user
Transmit content that may be harmful to minors
Impersonate another person (via the use of a telephone number or otherwise) or otherwise misrepresent yourself or the source of any phone call
Illegally transmit another's intellectual property or other proprietary information without such owner's or licensor's permission
Use Google Voice to violate the legal rights (such as rights of privacy and publicity) of others
Promote or encourage illegal activity
Interfere with other Google Voice users' enjoyment of the Google Voice Service
Create multiple user accounts in connection with any violation of the Agreement or create user accounts by automated means or under false or fraudulent pretenses
Sell, trade, resell or otherwise exploit for any unauthorized commercial purpose or transfer any Google Voice account
Modify, adapt, translate, or reverse engineer any portion of the Google Voice Service
Remove any copyright, trademark or other proprietary rights notices contained in or on the Google Voice Service
Reformat or frame any portion of the web pages that are part of the Google Voice Service