I also agree, 'ldg lts on' should be selected only when cleared for take off - sadly only one set of commercial SOP's I have ever flown to had this in them! One word of caution, there is risk in linking any additional action to the take off clearance as in moments of mental fog some may (wrongly) use the switch position to confirm an idea about the receipt of the clearance...potentially serious.
Incidentally, some I have flown to also suggested ldg lts on only after receipt of landing clearance on approach, try that at 50 feet coming into LHR! Problems with this also include aircraft visibility, e.g. in the hold, when amongst VFR traffic under RAS/RIS. So for me, on when cleared TO and on again when below 100/approasching the hold.
PS I know mod bods can't be everywhere but to be fair there are far more obnoxious individuals around than the admittedly rude pub user who seem to go unchecked!