if you are a huge nobber you can do this, and it'll do it to all your posts
but you can just ban em if people take the pee
just hitting enter on 'current landrover' and sticking the message in.
for now i'd do something like
.messageUserBlock .pairsJustified.userField_current_landrover_s {
max-height: 60px;
}
which will let you sort it out properly later, and give people a few lines. not sure it'll work with responsive, maybe change to a scaled unit.
or change the field from textarea to a text input and filter a bit on the backend if you need to
