I agree better be safe than Sorry. Men should do the following in my opinion to play safe from False and potential 498a/DV practitioners.
1) Do thorough pre-marital Background check of girl and family members. Any reliable detective agency can do this job for you. You will be surprised many marriages have got cancelled after inputs derived from such investigation. This applies for both Girl/Boy
2) Be Strictly Cautious / NO to marriage where 498a /DV is registered and huge alimony demanded , and most important where 498a / DV could not be PROVED. Such a family is trained in Using / misusing the law and would go legal at the drop of the hat without trying the mediation route in case of any marital discord.
3) Don't go for a kid atleast for 6months to a 1year OR as may be appropriate, during this time couples get ample time to know each other, if one see's any red flags then any further damage to relationship can be avoided. Pls remember there are statistics to prove that many women file 498a/DV cases after they conceive or kids are born. Unfortunately these greedy and selfish women use kids as a tool to harass husband and for claiming huge settlement amounts. Step/Point 1 can be applied at this stage as well.
4) If you are at stage of split or serious relationship issues then manage your finances carefully to avoid financial damage when maintenance/alimony will be claimed , this should be done smartly before things go out of hand. This is the most important aspect which men only realize when they are slapped with false 498a/DV cases /huge alimony amounts demanded. Once a man's backbone is broken after he gets hit in paying huge maintenance /alimony amounts he loses his patience & willpower to fight /and thus weakens his case.
Your cousin should have done this b4 marriage, by worrying about it now will only make him worry unnecessarily and doubt his wife. Also the guy & family should behave responsibly in the marriage and if he see's any red flags at any time during the marriage, he can take appropriate steps for prevention of such false cases. All the Best !!!