There can be multiple reasons for this. The primary reasons are:
1. Have most likely abused someone repeatedly and after repeated warnings, you did not stop abusing.
2. You were engaged in activities that are considered to sexual, illegal or hate speech.
3. You were adding content that is prohibited.
4. You were engaged in religious fanaticism.
5. You were nurturing and propagating anti-national sentiments.
Please note that we do not tolerate any activity that violates the guidelines of the community. Failure to adhere to those policies can mean account suspension or account deletion.