1.7 'ObSP' - obligatory on-topicness
Since most people prefer to read messages that are on-topic, off-topic messages
should at least include a little bit of on-topic material. The "ObSP" is short
for "Obligatory SP", and is usually a short, on-topic blurb used to make an
otherwise off-topic message at least -somewhat- relevant to most readers. Since
modern web-forums general have separated threads (or entire forums) for off-topic
posts, this is rarely used anymore.