Some wikipedians would like to have an automatic
detection of "questionable
modifications". Questionable modifications, mean, modifications that have a
great chance to be a rookie's test or a vandalism. This automatic detection
may be done by check, for example:
We have discussed the same on the german language Wikipedia some time ago (we
even collected those "keyboard tests" to do a (visual) pattern analysis) and
in the end, the idea was dropped more or less: Most of the vandalism edits in
existing articles don't follow that behaviour, and new articles are checked
anyway "by hand" for formatting and so on. The percentange of "bad"
that one could possibly find out with such a mechanism is so small, that it
is unlikely to justify the programming effort.