Domestic LPG cylinder leak - lights ON - explosion - deaths and injuries

In an incident of LPG leak from domestic gas cylinder five days ago, 8 persons died and 3 more are undergoing treatment.
In a housing complex, sensing gas leak in the opposite house, neighbors opened the house by getting the keys from the house owner and when switched ON the lights, the sparks caused gas explosion.

Gas detectors are the need of the hour and any gas leak detection should lead to display of warning sign of "DO NOT USE ELECTRIC SWITCHES-DO NOT USE MOBILES-SPARKS CAN CAUSE EXPLOSION" prominently so that even in panic condition one will not try to use electric switches.
Gas cylinder / piped gas distribution agencies can distribute do's and don'ts along with the cylinders by printing behind the bill or if somebody is paying online, these instructions should be displayed on the billing page and only after checking the boxes on each of the instructions, should lead to payment page. Further, distribution agencies and community centers may take up periodical training of residents and those who fail to attend the training programmes should be penalized by way of higher billing or in the worst case, cutting off of gas supply.

http://timesofindia.indiatimes.com/city/hyderabad/Entire-family-wiped-out-in-Vikarabad-gas-leak-blast/articleshow/19233935.cms