Let's see, with which country does India share the largest border?
Is it Pakistan? No.
Is it China? No.
Bangladesh? Yes.
Fencing may be a good way forward in theory, but are they going to fence the entire BD-Indo border? Electrify them? Mine that entire border area? Do they know how much that cost and the logistical headache to monitor every inch of the BD-Indo border 24/7? Even with the most advanced UAVs and satellite, it's not possible to track every single thing at the border.
Even the US still face problem of illegal immigrants from Mexico, and they have the best technology against which there's no equal.
People need to make a living. Everyone does. The cattle smugglers hope to cross over the border by evading government taxes. This way, they reap huge profits. This I do personally oppose.
Both the BSF and BDR have links with criminal underground organizations. And since cows don't exactly grow on trees, somebody must be supplying them to those very smugglers. This process is still ongoing, and I do not see neither government taking any action against this.
Another issue is the enclaves. This needs to be solved. The recent exchange resulted in India gaining more territory. And that caused any entity opposed to the AL rage over the whole issue.
Both countries should get a fair share of the enclaves. And not based on vested interests.
Wouldn't you say that taking down these networks and a fair exchange of enclaves are more cost-effective compared to fencing, electrifying, mining, all manner of electronic equipment, UAV surveillance, the entire BD-Indo border? That is a solution that only a madman can come up with.
Whatever India is doing on the border, it is largely their issue. But given that killing of unarmed Bangladeshis go on, it will not bear anything fruitful in the long term. And if there are indeed illegal Bangladeshis in India, then deport them. Bangladesh will have absolutely no problem with that.
People assume that that the current GoB is indeed an Indian puppet since none of the outstanding issues that are relevant to Bangladeshi interests are moving forward.