As a supporter of both the Guardian and Blackpool FC for more than 50 years, my loyalty to the former has been stretched by Will Unwin’s report (17 January) of Blackpool’s game with Nottingham Forest, which said “the home support brought renewed vigour to those in orange”. Surely he heard them singing that we are “the only team in football in tangerine and white”. Bill Haire Thornton-Cleveleys, Lancashire Here in California, the world’s fifth largest economy by GDP, tipping has reached everything except the toll booths – probably soon to come (Tipping in the US made me feel mortified and contrite, 7 January). We are now individually in charge of the wellbeing and poverty level of the person on the other side of the cash register. Ayn Rand has won! Jorge Salazar Los Angeles, California, US I’d like to congratulate those brave souls who continue to go commando (Letters, 15 January) during what many of us in the boating community are calling a “double pants and a pair of tights cold snap”. Ian Grieve Gordon Bennett, Llangollen canal I found your report (17 January) on the way dung beetles “coordinate transport” by cooperating with each other to be fascinating. I wonder if there are any jobs for them with the UK’s rail companies? Steve Townsley Bridgend