The CPS have released their guidelines on what you can and cannot say on Twitter before getting a knock on the door from the cops. On the banned list are:

1. Communications which may constitute credible threats of violence to the person or damage to property.
2. Communications which specifically target an individual or individuals and which may constitute harassment or stalking within the meaning of the Protection from Harassment Act 1997.
3. Communications which may amount to a breach of a court order. This can include offences under the Contempt of Court Act 1981, section 5 of the Sexual Offences (Amendment) Act 1992, breaches of a restraining order or breaches of bail. Cases where there has been an offence alleged to have been committed under the Contempt of Court Act 1981 or section 5 of the Sexual Offences (Amendment) Act 1992 should be referred to the Attorney General and via the Principal Legal Advisor’s team where necessary.
4. Communications which do not fall into any of the categories above and fall to be considered separately (see below): i.e. those which may be considered grossly offensive, indecent, obscene or false.

And crucially:

Against that background, prosecutors should only proceed with cases under section 1 of the Malicious Communications Act 1988 and section 127 of the Communications Act 2003 where they are satisfied there is sufficient evidence that the communication in question is more than:

Offensive, shocking or disturbing; or

Satirical, iconoclastic or rude comment; or

The expression of unpopular or unfashionable opinion about serious or trivial matters, or banter or humour, even if distasteful to some or painful to those subjected to it.

See the guidelines in full here. Prosecution face…