No need for PerlMonks-side changes if your browser supports CSS Level 2 - such as the venerable Mozilla. Try putting this at the end of your stylesheet:

a[HREF="/index.pl?node_id=186362"] {
    font-size: 2em;
    font-weight: bold;
    color: #f00;
}
[download]

Of course it will need another style definition for [adrianh] style links which end up as href="/index.pl?node=adrianh", but together that should cover 99.8% of all cases.

Makeshifts last the longest.