If by "safe" you mean "1 point won't insta ban you for life" then end of March next year. If by safe you mean "have more than 1 point breathing room" then end of April next year. If by safe you mean "I have no more points" then this time next year.
Ultimately it's up to you, although fwiw I'd recommend posting carefully as it'll build up good habits. If you do decide to post then make sure you are *particularly* careful, as you will probably find yourself watched rather closely.
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